Also during todays crash my rear rim got damaged (see pictures below). Can this sort of damage just be "knocked out" or is it going to need a new rim?

Cheers

Adjustable spanner or molegrips (protect rim with with a layer of thick card), clamp on , bend straight. If the rim cracks, new rim, if not, keep riding.

It'll be fine.
As above, straighten as best you can and keep riding it until it breaks…

😀

As above, protect rim with card/thick cloth and get a nice snug fit with your adjustable wrench, bend straight. Make sure you bend it at the same point it bent originally – ie dont bend it half way up the braking surface or you'll end up with a mess.

I did the same to my Swiss Cheeses too. I cried to Hope and they rebuilt it on a new rim (top chaps, as always) I have found running wider tyres stops the dents.

Also you'll want to check for radial flatspotting.

I've never damaged a rim as much as my 5.1s – destroyed them. I'll never get them again, anyway…
What I found works well was to get a big strong flat bladed screw driver under the rim edge and prise it back up using the other rim edge as the fulcrum. Your experience may differ 🙂

Cheers

Cheers for all the replies. I managed to get it looking a little better and took it to the LBS.